The local chaos player has gotten tired of painting red and started collecting Mechanicus (yeah, I know, I scratched my head too, but apparently he's painting them blue), so I sold the remaining Kataphrons for a loss, and the only bits I got to keep were the Gravguns. The money will be split between getting squigs (the greenstuffed ones didn't turn out well) and a battlewagon kit with a deffrolla.
On a side note, I've been google searching "looted kataphron" and "kataphron conversion" to see who else has been kitbashing them. Apart from one Dark Mechanicus conversion, all I can find are beakie conversions and surprisingly all but one of them only use stuff from the torso, and the one that actually uses the treads makes them into the rear end of a bike (an idea that I may loot myself one day). Now don't get me wrong, they're all lovely conversions, but I'm equal parts surprised and disappointed no one's stuck a beakie torso onto the treads. I mean, they had that one Imperial Fists Chaplain from the first beakie novel.
Huh, considering the looted kataphrons - I was actually thinking a little about using their tracks, but then as bases for grot tanks. The sizes are pretty similar, I think.
Looks nice so far.
I've communicated with another fellow who's doing that, though I haven't seen any WIPs yet. From the time I spent staring at the tracks and trying to figure out how to convert them to artillery, I can tell you that you'll want to build up with plasticard like I did with my warboss. It's disappointing how little room there is at the front of the tracks.